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Old 3rd January 2013, 10:00   #1
tikarttu
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KISS Classic without inboard cylinders

I have modified my KISS Classic Rebreather to use offboard cylinders only.

In the cave diving pictures 40 cf oxygen, 40 cf diluent and 80 cf alunimum cylinders are used.

Original idea is from Curt Bowen:

Comments are wellcome.

TK
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Old 4th January 2013, 11:49   #2
tikarttu
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Re: KISS Classic without inboard cylinders

Positive things of this configuration
- no need to have small cylinders
- no need to change (or fill) cylinders between long dives
- almost 80 + 40 cf emergency open circuit gas available
- cylinders can be attached and removed on the surface or under water
- any gas can be plugged to rb with right quick connect

Negative points
- more complicated
- less streamlined
- more expensive
- nonstandard configuration

TK
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Old 4th January 2013, 20:45   #3
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Re: KISS Classic without inboard cylinders

"- almost 80 + 40 cf emergency open circuit gas available"

is also a neg if the the problem is tank/valve/first stage/hose related
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Old 4th January 2013, 20:56   #4
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Re: KISS Classic without inboard cylinders

closer look at pics .....
looks like there is three side mounted tanks ,
if this is true what mixes ?
andy
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Old 4th January 2013, 22:29   #5
tikarttu
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Re: KISS Classic without inboard cylinders

Quote: (Originally Posted by stoneyfrog) View Original Post
... looks like there is three side mounted tanks ,
if this is true what mixes? andy
From right to left
- 40 cf oxygen for rebreather
- 40 cf air diluent for rebreather, wing and personal bailout
- 80 cf nitrox for drysuit and personal & buddy bailout (7 feet hose)

TK
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Old 5th January 2013, 02:22   #6
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Re: KISS Classic without inboard cylinders

In my very humble opinion, I would rather keep my onboard right where they are. Your gaining nothing as far as vertical profile. The scrubber is still there and limits you as far as restrictions. I am all about having the sidemounted bail outs plumbed in. Mine are sidemounted, and the one on my left is quick connected to be used either solely for my BOV, or to be used in conjunction with my dil manifold to run the breather, wing, etc. I will be adding a tripple MAV block soon which will allow my right side bottles, such as O2, to be quick connected in conjunction. All my bail out bottles are equipped with quick connects as well as second stages.

Cheers, Walt
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Old 22nd January 2013, 08:35   #7
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Re: KISS Classic without inboard cylinders

I also would not remove the 2 onboard bottles. in my opinoin you just lose:
  • the bigest part ist still the head+scrubber, so no benefit for moving in restrictions.
  • the onboard bottels are perfekt to proteckt the head and mor importand the 2 loop connectors. (btw: for a better balance and less stuck on the bottel top, cut-out a bit on the case and set them 5cm lower is fine..)
  • and as before already mention the dive time limits come frome scruber not from onboard gas (and if so, why not use a 3l 300bar O2/dil Bottle?)

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Old 22nd January 2013, 09:15   #8
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Thumbs up Re: KISS Classic without inboard cylinders

Quote: (Originally Posted by tikarttu) View Original Post
I have modified my KISS Classic Rebreather to use offboard cylinders only.
In the cave diving pictures 40 cf oxygen, 40 cf diluent and 80 cf alunimum cylinders are used.
Original idea is from Curt Bowen:
Comments are wellcome. TK
I'm no Cave Diver but to me you have a light unit to move around on land.
A decent amount of 02, great if you need to accelerate your Deco if on OC.
A nice amount of of Dil/OC Bailout gas.
All in All nice, i see no real Dangers with your setup
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Old 22nd January 2013, 11:08   #9
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I would think would be a great setup for traveling where they may not have any small rebreather tanks to rent.
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Old 23rd January 2013, 22:58   #10
tikarttu
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Re: KISS Classic without inboard cylinders

Quote: (Originally Posted by andreasCH) View Original Post
I also would not remove the 2 onboard bottles. in my opinoin you just lose:[*]the bigest part ist still the head+scrubber, so no benefit for moving in restrictions.[*]the onboard bottels are perfekt to proteckt the head and mor importand the 2 loop connectors. (btw: for a better balance and less stuck on the bottel top, cut-out a bit on the case and set them 5cm lower is fine..)[*] and as before already mention the dive time limits come frome scruber not from onboard gas (and if so, why not use a 3l 300bar O2/dil Bottle?)
Problems of normal KISS configuration:
- 2 ltr cylinders may not have enough gas for second long cavedive
- 3 ltr cylinders are often the highest point of diver

Positive points of alternative configuration:
+ Problems of sidemounted cylinder valve and 1st stage area are easy to detect and manage
+ Diver can push sidemounted cylinders ahead if needed

In the picture oxygen flows down through Manual Add Valve.

TK
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